NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Physics MCQs (Practice_Test 26 of 35)
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- The given figure shows the waveforms for two inputs A and B and that for the output Y of a logic circuit. The logic circuit is
- an AND gate
- an OR gate
- a NAND gate
- an Exclusive OR gate
- Assertion (A) : p-n junction diodes can be used even at ultra high frequencies.
- Reason (R) : Capacitate reactance of a p-n junction diode increases as frequency increases.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not a correct explanation of A
- A is true, but R is false
- A is false but R is true
- Assertion (A) : e/m of beta particles is not constant.
- Reason (R) : Velocities of beta particles are quite high and are comparable to the velocity of light.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not a correct explanation of A
- A is true, but R is false
- A is false but R is true
- Assertion (A) : In Compton effect, the scattered photon has more energy than the incident photon.
- Reason (R) : Energy and momentum are conserved during the scattering of a photon by an electron.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not a correct explanation of A
- A is true, but R is false
- A is false but R is true
- Assertion (A) : When a sound wave propagates through air, the displacements take place in the direction of propagation.
- Reason (R) : Sound waves can be polarized as in the case of light rays.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not a correct explanation of A
- A is true, but R is false
- A is false but R is true
- Assertion (A) : A convex lens suffers from chromatic aberration.
- Reason (R) : All parallel rays passing through a convex lens do not come to a focus at the same point.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not a correct explanation of A
- A is true, but R is false
- A is false but R is true